79639020 has 36 divisors (see below), whose sum is σ = 241572240. Its totient is φ = 21237024.

The previous prime is 79639003. The next prime is 79639039. The reversal of 79639020 is 2093697.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221040 + ... + 221399.

It is an arithmetic number, because the mean of its divisors is an integer number (6710340).

Almost surely, 2^79639020 is an apocalyptic number.

It is an amenable number.

79639020 is an abundant number, since it is smaller than the sum of its proper divisors (161933220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79639020 is a wasteful number, since it uses less digits than its factorization.

79639020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442454 (or 442449 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 79639020 is about 8924.0696994141. The cubic root of 79639020 is about 430.2378709122.

The spelling of 79639020 in words is "seventy-nine million, six hundred thirty-nine thousand, twenty".